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задание на фото) помогите...

irinan2014

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Всё подробно написала в решении....................

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ann1885 №370=(√21*+√14-2√35)*√7+√20=√7*7*3+√7*7*2-2√7*7*5+√20=7√3+7√2-2*7√5+2√5=7√3+7√2-7√20+√20=7√3+7√2-12√5
=√5*5-√5*3+√5*3-√3*3-√15*5+√15*3+√75=5-3-√75+√5*5*3+√75=2+3√5

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